Class TypeExtensions

Various extension methods for type reflection.

Inheritance
object
TypeExtensions
Inherited Members
Namespace: DotNext.Reflection
Assembly: DotNext.dll
Syntax
public static class TypeExtensions

Methods

View Source

Cast(Type, object?)

Casts an object to the class, value type or interface.

Declaration
public static object? Cast(this Type type, object? obj)
Parameters
Type Name Description
Type type
object obj

The object to be cast.
Returns
Type Description
object

The object after casting, or null if obj is null.
Exceptions
Type Condition
InvalidCastException

If the object is not null and is not assignable to the expected type; or if object is null and the type is value type.
View Source

Devirtualize(Type, MethodInfo)

Returns method that overrides the specified method.

Declaration
[RequiresUnreferencedCode("Dynamic code generation may be incompatible with IL trimming")]
public static MethodInfo? Devirtualize(this Type type, MethodInfo abstractMethod)
Parameters
Type Name Description
Type type
MethodInfo abstractMethod

The abstract method definition.
Returns
Type Description
MethodInfo

The method that overrides abstractMethod.
View Source

GetBaseTypes(Type, bool, bool)

Returns read-only collection of base types and, optionally, all implemented interfaces.

Declaration
public static IEnumerable<Type> GetBaseTypes(this Type type, bool includeTopLevel = false, bool includeInterfaces = false)
Parameters
Type Name Description
Type type
bool includeTopLevel

true to return the top-level type as the first element in the collection.
bool includeInterfaces

true to include implemented interfaces; false to return inheritance hierarchy only.
Returns
Type Description
IEnumerable<Type>

Read-only collection of base types and, optionally, all implemented interfaces.
View Source

GetGenericArguments(Type, Type)

Returns actual generic arguments passed into generic type definition implemented by the input type.

Declaration
public static Type[] GetGenericArguments(this Type type, Type genericDefinition)
Parameters
Type Name Description
Type type
Type genericDefinition

The definition of generic type.
Returns
Type Description
Type[]

The array of actual generic types required by genericDefinition.
Examples
var elementTypes = typeof(byte[]).IsGenericInstanceOf(typeof(IEnumerable<>));
elementTypes[0] == typeof(byte); //true
View Source

IsAssignableFromWithoutBoxing(Type, Type)

Indicates that object of one type can be implicitly converted into another without boxing.

Declaration
public static bool IsAssignableFromWithoutBoxing(this Type type, Type from)
Parameters
Type Name Description
Type type
Type from

The type check.
Returns
Type Description
bool

true if from is implicitly convertible to the receiver type without boxing.
Examples
typeof(object).IsAssignableFrom(typeof(int)); //true
typeof(object).IsAssignableFromWithoutBoxing(typeof(int)); //false
typeof(object).IsAssignableFrom(typeof(string));    //true
typeof(object).IsAssignableFromWithoutBoxing(typeof(string));//true
See Also
View Source

IsGenericInstanceOf(Type, Type)

Determines whether the type is an instance of the specified generic type.

Declaration
public static bool IsGenericInstanceOf(this Type type, Type genericDefinition)
Parameters
Type Name Description
Type type
Type genericDefinition

Generic type definition.
Returns
Type Description
bool

true, if the type is an instance of the specified generic type; otherwise, false.
Examples
typeof(byte[]).IsGenericInstanceOf(typeof(IEnumerable<>));    //returns true
typeof(List<int>).IsGenericInstanceOf(typeof(List<int>));   //returns true
View Source

get_DefaultValue(Type)

Gets default value for the specified type.

Declaration
public static object? get_DefaultValue(Type type)
Parameters
Type Name Description
Type type
Returns
Type Description
object

The default value of type type.
Remarks

The method returns null for all reference and pointer types and default boxed value for value types.

View Source

get_IsImmutable(Type)

Determines whether the type is read-only (immutable) value type.

Declaration
public static bool get_IsImmutable(Type type)
Parameters
Type Name Description
Type type
Returns
Type Description
bool

true, if the specified type is immutable value type; otherwise, false.
View Source

get_IsUnmanaged(Type)

Determines whether the type is unmanaged value type.

Declaration
[RequiresUnreferencedCode("Dynamic code generation may be incompatible with IL trimming")]
public static bool get_IsUnmanaged(Type type)
Parameters
Type Name Description
Type type
Returns
Type Description
bool

true, if the specified type is unmanaged value type; otherwise, false.
View Source

get_IsVoid(Type)

Gets a value indicating that the type is void.

Declaration
public static bool get_IsVoid(Type type)
Parameters
Type Name Description
Type type
Returns
Type Description
bool